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Thread: ZZE-122 ECU rev limiter

  1. #1
    Forum Member 1st year Apprentice
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    Default ZZE-122 ECU rev limiter

    Does anyone know if theres someone out there that can disable the rev limiter and still using the factory ZZE-122 Denso ECU , as it cuts in right on the redline of 6,400 rpm
    I know people will say that 6,400 rpm is plenty as its max power comes in at 6,000 rpm but when racing the car we are have change gears in the most inconvenient spots on the track
    ( in one section part we go from 2nd to 3rd and straight back to 2nd again which affects lap times )
    If we could get it to the high 6,s it would make a huge difference

  2. #2
    Cressidaspert Carport Converter andrew_mx83's Avatar
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    Default Re: ZZE-122 ECU rev limiter

    On the 7m ecu we used to swap out the crystals for higher frequency ones to bump up the rev limit, may or may not help yours
    There is no substitute for PUBIC inches

    Never late in an x8

  3. #3
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    Default Re: ZZE-122 ECU rev limiter

    Quote Originally Posted by andrew_mx83 View Post
    On the 7m ecu we used to swap out the crystals for higher frequency ones to bump up the rev limit, may or may not help yours
    Did you swap the crystals yourself or did you get someone to do it and where did you buy the higher frequency crystals from

  4. #4
    Cressidaspert Carport Converter andrew_mx83's Avatar
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    Default Re: ZZE-122 ECU rev limiter

    They came from RS components and yeah we fitted them ourselves. Would pay to have a couple spare ecus to practice on first depending how handy you are with the soldering iron
    There is no substitute for PUBIC inches

    Never late in an x8

  5. #5
    Forum Member 1st year Apprentice
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    Default Re: ZZE-122 ECU rev limiter

    Quote Originally Posted by andrew_mx83 View Post
    They came from RS components and yeah we fitted them ourselves. Would pay to have a couple spare ecus to practice on first depending how handy you are with the soldering iron
    Thanks for the info and yes Iam already getting another one to trial first, also was your ECU plug and play or did it have to be programmed to the car

  6. #6
    Chookhouse Chooning Automotive Encyclopaedia Hen's Avatar
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    Default Re: ZZE-122 ECU rev limiter

    I'm purely quoting internet "know-how" here, but apparently the earliest 2ZZ ECUs had a higher fuelcut. Then after some engine failures due to missed shifts and over-rev the fuelcut was dropped for later generations.

    May or may not be true, but it sounds like an early ECU (if the other pinouts are compatible) could sort you out.
    I need a working 4AGE bottom end. Pref smallport GZE, but all others considered. Also complete motors.
    Drift Volvo. Was fun. 2JZ next time.

  7. #7
    Toymods Board Member Chief Engine Builder Hiro's Avatar
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    Default Re: ZZE-122 ECU rev limiter

    Quote Originally Posted by Hen View Post
    I'm purely quoting internet "know-how" here, but apparently the earliest 2ZZ ECUs had a higher fuelcut. Then after some engine failures due to missed shifts and over-rev the fuelcut was dropped for later generations.

    May or may not be true, but it sounds like an early ECU (if the other pinouts are compatible) could sort you out.
    There are differences in rev-limit and lift engagement amongst the various years/markets for the 2ZZ, as well as differences between Corolla and Celica.
    AE102 - Charlene the Old Faithful, Reborn
    JZZ30 - Lexi the Spacecruiser, 1JZGTE>>3SGE. 200rwkw, hunting Skylines and n00bs in SS Commodores
    ST162 - Charlie the non-ghey Celica, 3SGE>>4AGE. GOOOOOOOONE
    AE82 - Rosie the Bitsa from Hell, 70.8kw atw. Has been converted into garage space and money at last
    KE55 - Billie the Beast, sadly missed

  8. #8
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    Default Re: ZZE-122 ECU rev limiter

    Quote Originally Posted by Hen View Post
    I'm purely quoting internet "know-how" here, but apparently the earliest 2ZZ ECUs had a higher fuelcut. Then after some engine failures due to missed shifts and over-rev the fuelcut was dropped for later generations.

    May or may not be true, but it sounds like an early ECU (if the other pinouts are compatible) could sort you out.
    Thanks for the info and wished thatís all we needed to do but we are using the standard 1ZZ-FE engine in a
    2002 ZZE-122 we are racing, which is fairly early in that series
    From memory they finished production in 2007

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